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arch/risc-v/espressif: Add LP_ADC support

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Add LP_ADC support

Signed-off-by: Eren Terzioglu <eren.terzioglu@espressif.com>
This commit is contained in:
Eren Terzioglu
2026-04-14 13:54:18 +02:00
committed by simbit18
parent e2cc71f540
commit 2da63a0679
2 changed files with 36 additions and 5 deletions
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arch/risc-v/src/common/espressif/Kconfig
+5
View File
@@ -1414,6 +1414,11 @@ config ESPRESSIF_ADC_1
default y
bool "Enable SAR ADC 1"
config ESPRESSIF_ADC_1_USE_LP
depends on ESPRESSIF_ADC_1 && ARCH_CHIP_ESP32P4
default n
bool "Use ADC 1 as LP ADC"
config ESPRESSIF_ADC_2
default n
depends on ARCH_CHIP_ESP32P4
arch/risc-v/src/common/espressif/esp_adc.c
+31 -5
View File
@@ -504,6 +504,7 @@ static int esp_adc_oneshot_new_unit(struct adc_dev_s *dev)
adc_oneshot_hal_cfg_t config;
irqstate_t flags;
uint32_t clk_src_freq_hz = 0;
soc_module_clk_t clk_src = ADC_DIGI_CLK_SRC_DEFAULT;
DEBUGASSERT(priv);
DEBUGASSERT(priv->mode == ESP_ADC_MODE_ONE_SHOT);
@@ -516,20 +517,38 @@ static int esp_adc_oneshot_new_unit(struct adc_dev_s *dev)
flags = spin_lock_irqsave(&g_adc_common.esp_adc_spinlock);
esp_clk_tree_src_get_freq_hz(ADC_DIGI_CLK_SRC_DEFAULT,
#if SOC_LP_ADC_SUPPORTED && defined(CONFIG_ESPRESSIF_ADC_1_USE_LP)
if (priv->unit == ADC_UNIT_1)
{
clk_src = LP_ADC_CLK_SRC_LP_DYN_FAST;
}
#endif
esp_clk_tree_src_get_freq_hz(clk_src,
ESP_CLK_TREE_SRC_FREQ_PRECISION_CACHED,
&clk_src_freq_hz);
config.unit = priv->unit;
config.work_mode = ADC_HAL_SINGLE_READ_MODE;
config.clk_src = ADC_DIGI_CLK_SRC_DEFAULT;
config.clk_src = clk_src;
config.clk_src_freq_hz = clk_src_freq_hz;
#ifdef CONFIG_ESPRESSIF_ADC_1_USE_LP
if (priv->unit == ADC_UNIT_1)
{
config.work_mode = ADC_HAL_LP_MODE;
}
else
#endif
{
config.work_mode = ADC_HAL_SINGLE_READ_MODE;
}
adc_oneshot_hal_init(hal, &config);
/* Enable peripheral and power ADC */
adc_apb_periph_claim();
if (ADC_LL_NEED_APB_PERIPH_CLAIM(priv->unit))
{
adc_apb_periph_claim();
}
sar_periph_ctrl_adc_oneshot_power_acquire();
@@ -588,6 +607,13 @@ static int esp_adc_oneshot_config_channel(struct adc_dev_s *dev,
flags = spin_lock_irqsave(&g_adc_common.esp_adc_spinlock);
adc_oneshot_hal_channel_config(hal, &config, channel);
#ifdef CONFIG_ESPRESSIF_ADC_1_USE_LP
if (priv->unit == ADC_UNIT_1)
{
adc_oneshot_hal_setup(hal, channel);
}
#endif
spin_unlock_irqrestore(&g_adc_common.esp_adc_spinlock, flags);
ainfo("init adc unit %u, ch %u (gpio %d), atten %d, bitwidth %d",